package com.sc.security.service.image;

import com.sc.security.properties.SecurityProperties;
import com.sc.security.service.ValidateCodeGenerator;
import com.sc.security.validate.code.image.ImageCode;
import lombok.Data;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;

/**
 * @author sc
 * Created on  2018/1/17
 */

@Data
@Component
public class ImageCodeGenDefault implements ValidateCodeGenerator {

    private SecurityProperties properties = new SecurityProperties();

    @Override
    public ImageCode generate(ServletWebRequest request) {
        int width  = ServletRequestUtils.getIntParameter(request.getRequest(),"width",properties.getCode().getImage().getWidth());
        int height = ServletRequestUtils.getIntParameter(request.getRequest(),"height",properties.getCode().getImage().getHeight());
        BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        Random random = new Random();

        g.setColor(getRandColor(200,250));
        g.fillRect(0,0,width,height);
        g.setFont(new Font("Times New Roman",Font.ITALIC,20));
        g.setColor(getRandColor(160,200));

        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x,y,x+xl,y+yl);
        }
        String sRand = "";
        for (int i = 0; i < properties.getCode().getImage().getLength(); i++) {
            String rand = String.valueOf(random.nextInt(10));
            sRand +=rand;
            g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
            g.drawString(rand,13*i+6,16);
        }
        g.dispose();
        return new ImageCode(image,sRand,ServletRequestUtils.getIntParameter(request.getRequest(),"expire",properties.getCode().getImage().getExpire()));
    }

    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if(fc>255){
            fc=255;
        }
        if(bc>255){
            bc=255;
        }
        int r = fc+random.nextInt(bc-fc);
        int g = fc+random.nextInt(bc-fc);
        int b = fc+random.nextInt(bc-fc);
        return new Color(r,g,b);
    }
}
